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Swimming performance, whole body ions, and gill Al accumulation during acclimation to sublethal aluminium in juvenile rainbow trout (Oncorhynchus mykiss) by Rod W. Wilson; Chris M. Wood is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Swimming performance, whole body ions, and gill Al accumulation during acclimation to sublethal aluminium in juvenile rainbow trout (Oncorhynchus mykiss) about?

Juvenile rainbow trout (2-5 g) were chronically exposed (for 22 days) to acidified softwater (Ca 2 + = 25 /pEq/l, pH 5.2) in the presence or absence sublethal Al (30 /zg/l). Al-exposed fish (5.2/Al group) suffered 20% whole body Na+ and Cl-losses and a 30% reduction in the maximum sustainable swimming speed (Ucrit) over the initial 7 days. These disturbances were approximately 2 fold greater than those observed in the fish exposed to low pH alone (5.2/0 group). However, whole body ion levels were completely restored in the 5.2/Al fish by day 22, whereas they merely stabilized at a new reduced level in the 5.2/0 group. Increased resistance to acutely lethal Al (200 /xg/l at pH 5.2) was observed from day 17 onwards in the 5.2/Al fish. Despite this acclimation and recovery of whole body ions, Ucrit remained significantly lower than in the 5.2/0 group throughout. Growth on a restricted diet of 1 %7o body wt./day was normal in the 5.2/0 group compared with controls maintained in pH 6.5 softwater, whereas 5.2/Al fish suffered a 50% reduction in growth rate on the same diet. The 5.2/Al fish accumulated large amounts of Al on the gills, reaching an initial peak after 4 days, followed by a

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Author

Rod W. Wilson; Chris M. Wood

Publisher

Springer; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0920-1742)

Published

1992

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)